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How do I read all classes from a Java package in the classpath?
I need to read classes contained in a Java package. Those classes are in classpath. I need to do this task from a Java program directly. Do you know a simple way to do?
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What is the meaning of “this” in Java?
...ut explains very well all different uses of the this keyword:
Definition: Java’s this keyword is used to refer the current instance of the method on which it is used.
Following are the ways to use this:
To specifically denote that the instance variable is used instead of static or local variab...
Size-limited queue that holds last N elements in Java
A very simple & quick question on Java libraries: is there a ready-made class that implements a Queue with a fixed maximum size - i.e. it always allows addition of elements, but it will silently remove head elements to accomodate space for newly added elements.
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Setting a system environment variable from a Windows batch file?
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Simple example for how to set JAVA_HOME with setx.exe in command line:
setx JAVA_HOME "C:\Program Files (x86)\Java\jdk1.7.0_04"
This will set environment variable "JAVA_HOME" for current user. If you want to set a variable for all users, you have to us...
Get OS-level system information
I'm currently building a Java app that could end up being run on many different platforms, but primarily variants of Solaris, Linux and Windows.
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How to initialize all the elements of an array to any specific value in java
In C/C++ we have memset() function which can fulfill my wish but in Java how can i initialize all the elements to a specific value? Whenever we write int[] array=new int[10]; , this simply initialize an array of size 10 having all elements equal to zero. I just want to change this initializa...
Similarity String Comparison in Java
...in Edit Distance
// See http://rosettacode.org/wiki/Levenshtein_distance#Java
public static int editDistance(String s1, String s2) {
s1 = s1.toLowerCase();
s2 = s2.toLowerCase();
int[] costs = new int[s2.length() + 1];
for (int i = 0; i <= s1.length(); i++) {
int lastVa...
What is the “volatile” keyword used for?
...t usage. Could you please tell me what it should be used for in C# and in Java?
8 Answers
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Accessing members of items in a JSONArray with Java
I'm just getting started with using json with java. I'm not sure how to access string values within a JSONArray. For instance, my json looks like this:
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How can I lookup a Java enum from its String value?
...says that static initialization occurs from top to bottom: docs.oracle.com/javase/specs/jls/se7/html/jls-8.html#d5e12267
– Selena
Oct 15 '14 at 18:22
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